<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
  </head>

  <body>
    <div id="app">
      <!-- <h2 :style="{key(属性名): value(属性值)}">{{message}}</h2> -->
      <!-- 如果属性值不加引号，则会被当成变量去解析 -->
      <!-- <h2 :style="{fontSize: '50px'}">{{message}}</h2> -->
      <!-- finalSize被当成一个变量 -->
      <!-- <h2 :style="{fontSize: finalSize}">{{message}}</h2> -->
      <h2 :style="{fontSize: finalSize + 'px', color: finalColor}">
        {{message}}
      </h2>
      <h2 :style="getStyle()">{{message}}</h2>
    </div>

    <script src="../js/vue.js"></script>
    <script>
      const app = new Vue({
        el: '#app',
        data: {
          message: '你好',
          finalSize: 100,
          finalColor: 'red'
        },
        methods: {
          getStyle: function () {
            return {
              fontSize: this.finalSize + 'px',
              color: this.finalColor
            }
          }
        }
      })
    </script>
  </body>
</html>
